[WoofDog123]

based on what is known about cataclysmic impacts in the last several thousand years, our odds of meteor/comet impacts collapsing civilization in the next 40 years are possibly even a few%...throw in a volcanic super-eruption (i.e. thera, hekla, what was that other one heard 'round the world?) and we might qualify as 1 in 20 for a 'bad to really bad' event by mid-century.

[Einigkeit_Recht_Freiheit]

giving the fabric of space-time a good shake.

All kidding aside, can anyone begin to explain what this actually means? I understand that a lot of energy will be released at the X-ray level, but not really an explosion vis a vis a super-nova because no matter will escape the gravitational pull.

Einstein said gravity was merely a distortion of the time-space grid by matter and energy. Fine, I saw the Simpson episode where they tried to visualize it, but what does such a collision really mean in terms of physics and reality?

[rmlew]

Thera?
Forget Thera. Yellowstone PArk is actually a Caldera. It is literally rising due to a build up of Magma in its magma chamber. Based on the gelogic recorfd it is due to blow, covering the continent in ash.

I see you also saw the Discover Channel show on mega-tsunami.